On Thu, Nov 30, 2017 at 03:05:40PM +0100, Lucas Stach wrote:
> Seems, Daniel lost the CC in the reply. Adding again.
>
> Am Donnerstag, den 30.11.2017, 14:51 +0100 schrieb Daniel Vetter:
> > On Thu, Nov 30, 2017 at 02:31:46PM +0100, Lucas Stach wrote:
> > > drm_atomic_helper_wait_for_vblanks will go away in the future.
> > >
> > > The new drm_atomic_helper_setup_commit in 4.15 expects that blocking commits
> > > have completed flipping before the commit_tail returns. This must be ensured
> > > by calling wait_for_vblanks or wait_for_flip_done, where flip_done might do
> > > a less agressive wait, which is fine for imx-drm.
> > >
> > > Fixes: 080de2e5be2d (drm/atomic: Check for busy planes/connectors before
> > > setting the commit)
> > > Signed-off-by: Lucas Stach <l.stach@xxxxxxxxxxxxxx>
> >
> > > Reviewed-by: Daniel Vetter <daniel.vetter@xxxxxxxx>
> >
> > Anyone volunteering for all the other drivers? Or at least a todo entry?
>
> Yeah, I'll look into converting the other drivers. But needs to wait
> until next week.
Awesome, thanks a lot.
-Daniel
>
> Regards,
> Lucas
>
> > -Daniel
> >
> > > ---
> > > drivers/gpu/drm/imx/imx-drm-core.c | 11 +++++++++--
> > > 1 file changed, 9 insertions(+), 2 deletions(-)
> > >
> > > diff --git a/drivers/gpu/drm/imx/imx-drm-core.c b/drivers/gpu/drm/imx/imx-drm-core.c
> > > index 179f9aeefd98..db6afaa3f25f 100644
> > > --- a/drivers/gpu/drm/imx/imx-drm-core.c
> > > +++ b/drivers/gpu/drm/imx/imx-drm-core.c
> > > @@ -134,9 +134,16 @@ static void imx_drm_atomic_commit_tail(struct drm_atomic_state *state)
> > > > > plane_disabling = true;
> > > > > }
> > >
> > > > > - if (plane_disabling) {
> > > > > - drm_atomic_helper_wait_for_vblanks(dev, state);
> > > > > + /*
> > > > > + * The flip done wait is only strictly required by imx-drm if a deferred
> > > > > + * plane disable is in-flight. As the core requires blocking commits
> > > > > + * to wait for the flip it is done here unconditionally. This keeps the
> > > > > + * workitem around a bit longer than required for the majority of
> > > > > + * non-blocking commits, but we accept that for the sake of simplicity.
> > > > > + */
> > > > > + drm_atomic_helper_wait_for_flip_done(dev, state);
> > >
> > > > > + if (plane_disabling) {
> > > > > for_each_old_plane_in_state(state, plane, old_plane_state, i)
> > > > > ipu_plane_disable_deferred(plane);
> > >
> > > --
> > > 2.11.0
> > >
> > > _______________________________________________
> > > dri-devel mailing list
> > > dri-devel@xxxxxxxxxxxxxxxxxxxxx
> > > https://lists.freedesktop.org/mailman/listinfo/dri-devel
> >
> >
--
Daniel Vetter
Software Engineer, Intel Corporation
http://blog.ffwll.ch
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